Besides, it's not really the same as the original, as not only is the percussion different than the original song (ie, constant bass and snares and no high hats), but there's also instruments that instruments that aren't supplementing the melody like the original song.

If you're talking about the NSF one, then he said he transcribed it by ear first before converting it to a nes-like song.

Grammer Nazi! Don't worry about though, I'm the one who contacted the mastermind behind offspring fling as well as Snapshot asking him why his company is the grammatically incorrect "Retro Affect" instead of "Retro Effect". His response? They liked it more because: